Analysis of the pore structure of the MCM-41 materials

Application of MCM-41 for dyes removal from wastewater

“…It is characterized by parallel and ideally shaped pore structures without the complications of a network. The cylindrical pore structure and high degree of pore symmetry found in MCM-41 have made it an ideal candidate for testing various existing adsorption and diffusion models [23]. Moreover, its large surface area and nanometer-sized pore sizes (from 20 to 100Å) [22] also offer a special environment for chemical separations of large molecules (such as dyes).…”

Determination of catalyst wetting fraction on the molecular level

“…Therefore, there is a gassolid equilibrium between the bulk gas and the adsorbed gas, and there is also a gas-liquid equilibrium between the bulk gas and the condensed liquid, which are described by the density functional theory, or by an appropriate adsorption equation or the Kelvin equation. [7][8][9] Experimentally, they can be measured conventionally by the adsorption methods, [10][11][12][13][14] or in some cases by the solid-state nuclear magnetic resonance. 15 In this work, an adsorption method will be used, since it can not only provide the amount of adsorption, more importantly it can provide the critical point of capillary con-densation from the interaction of the hysteresis loop formed by the adsorption and desorption isotherms.…”

Nanoporous calcined MCM-41 silica for adsorption and removal of Victoria blue dye from different natural water samples

“…MCM-41 is a synthetic, mesoporous silicate material, which currently has limited use as an industrial catalyst [3]. Mesoporous MCM-41 has superior advantages over zeolites due to its relatively large and tunable pore size (14- ordered pore structure [4]. MCM-41 materials with hexagonal arrangement of parallel mesopores are attractive as host molecules for various guests and have been investigated for adsorptive removal of various inorganics [5][6][7][8][9] and organics such as aniline [10], p-chlorophenol, phenols [11,12], dyes [13][14][15], and pharmaceutical compound [16,17] in aqueous solutions.…”